Installation
4990671000 February 2008
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4.7.2
Cell Ventilation
The cell ventilation is required to ensure the proper op-
eration of the liquid ring pump at low intake pressure
down to total residual pressure. The ventilation line is
connected on the A-side and B-side housing covers
(see figure 1.1 connection socket “Z”).
Aqualine models 1100/1600/2100 need a ventilation
line with a pipe internal diameter Øi = 28 mm. Aqualine
model 2700 required pipe internal diameter Øi =
52 mm. The specified cross sections refer to about
2.5 meters line length. The ventilation line must be in-
stalled at an upward gradient and the connection is
made on the “clean side” of the water separation ves-
sel.
Make sure the entrained air line is the correct
size. Ensure sufficient fresh air can enter the
work space of the liquid pump via the ventila-
tion line. This is done by running the liquid
pump with a closed intake line. If a loud noise
is heard, the entrained air flow rate is insuffi-
cient. In this case a larger ventilation line must
be installed.
If you want to drain all operating fluid from the liquid
ring pump, open both water drains (see figure 1.1).
4.8
Drive
The direction of rotation must agree with the
direction of the arrow on the liquid ring pump.
Permitted speed range: 1,100 to 1,500 rpm
Ensure the drive speed increasing or reducing
ratios are observed (belt drive, auxiliary drive
of vehicle, ...)
We recommend a speed monitor at the liquid ring
pump with an indicator in the operating area.
Check the speed after installing the liquid ring pump
and put up a note for the operator of the vehicle.
If the machine is powered by a combustion engine, the
engine must have speed control which limits the speed
to a permitted level if the power requirement drops.
The axial thrust of the drive must not be trans-
ferred to the rotor shaft.
Install the drive components on the rotor shaft
using the available M16 thread.
Do not use a hammer or other impact device to
install the drive components on the rotor shafts
A coupling guard must be fitted as appropriate.
4.8.1
Drive by hydraulic motor
The selection and installation of the hydraulic motor is
the responsibility of the installation firms.
We can supply a matching flange and coupling.
After mounting the flange, the motor side coupling hub
must not transfer axial thrust onto the liquid ring pump.
4.8.2
Drive by flexible coupling
If the pump is coupled directly to the drive (e.g. diesel
engine) a torsionally flexible coupling that compen-
sates most of the drive irregularities must be selected
according to the specifications of the engine maker.
Align the coupling exactly as prescribed by the
manufacturer.
4.8.3
Drive by propeller shaft
The propeller shaft drive must
•
incorporate a splined shaft,
•
be balanced,
•
have smallest possible angles and be as short as
possible.
The centre axes of the propeller shaft flanges must be
parallel with each other.
